Consolidated Statements of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Common treasury shares (in shares)	41,429,692	43,040,406	41,429,692	43,040,406	41,816,674	42,494,684	43,095,635	45,243,329
Cash dividends declared per common share (in dollars per share)	$ 0	$ 0	$ 0	$ 0